So, Gingerbread has finally dropped below 50% of devices accessing Google Play. Ice Cream Sandwich has almost hit the 30%, and after six months, Jelly Bean (4.1 and 4.2) almost hit the 10%. Google's page listing these numbers is like a trainwreck in slowmotion.

With Apple there's fragmentation based on hardware, not much different. Apple actively promoted, pushed iPhone 3GS for a really long time - so that there are certainly people who bought it new fairly recently. Not even all the advertised OS functions work on it; plus there are demanding applications which won't run...